[#5554] cat /proc/mtd doesn't always show ubifs partitions

Submitted By: Mingquan Pan

Open Date

2009-09-23 23:30:36 Close Date

2009-09-24 04:03:13

Priority:

Medium Assignee:

Nobody

Status:

Closed Fixed In Release:

N/A

Found In Release:

2010R1 Release:

Category:

N/A Board:

N/A

Processor:

BF537 Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Assigned (Not Start)

Uboot version or rev.:

Toolchain version or rev.:

09r1-rc9

App binary format:

N/A

Summary: cat /proc/mtd doesn't always show ubifs partitions

Details:

cat /proc/mtd doesn't always show ubifs partitions. Sometimes the newly made volumn doesn't show by catting /proc/mtd, even the mtd device is formatted previously. this also happens to some existing volumns, and if you want to make the volumn again ,it would say that exists.

root:/> ubiformat /dev/mtd1

ubiformat: mtd1 (NAND), size 130023424 bytes (124.0 MiB), 131072 eraseblocks of 131072 bytes (128.0 KiB), min. I/O size 2048 bytes

libscan: scanning eraseblock 991 -- 100 % complete

ubiformat: 990 eraseblocks have valid erase counter, mean value is 8

ubiformat: bad eraseblocks: 679, 746

ubiformat: warning!: VID header and data offsets on flash are 512 and 2048, which is different to calculated offsets 2048 and 4096

ubiformat: use new offsets 512 and 2048? (yes/no) no

ubiformat: formatting eraseblock 991 -- 100 % complete

root:/> cat /proc/mtd

dev: size erasesize name

mtd0: 00400000 00020000 "linux kernel(nand)"

mtd1: 07c00000 00020000 "file system(nand)"

root:/> ubiattach /dev/ubi_ctrl -m 1

UBI: attaching mtd1 to ubi0

UBI: physical eraseblock size: 131072 bytes (128 KiB)

UBI: logical eraseblock size: 129024 bytes

UBI: smallest flash I/O unit: 2048

UBI: sub-page size: 512

UBI: VID header offset: 512 (aligned 512)

UBI: data offset: 2048

UBI: attached mtd1 to ubi0

UBI: MTD device name: "file system(nand)"

UBI: MTD device size: 124 MiB

UBI: number of good PEBs: 990

UBI: number of bad PEBs: 2

UBI: max. allowed volumes: 128

UBI: wear-leveling threshold: 4096

UBI: number of internal volumes: 1

UBI: number of user volumes: 0

UBI: available PEBs: 977

UBI: total number of reserved PEBs: 13

UBI: number of PEBs reserved for bad PEB handling: 9

UBI: max/mean erase counter: 22/9

UBI: background thread "ubi_bgt0d" started, PID 226

UBI device number 0, total 990 LEBs (127733760 bytes, 121.8 MiB), available 977 LEBs (126056448 bytes, 120.2 MiB), LEB size 129024 bytes (126.0 KiB)

root:/>

root:/> ubimkvol /dev/ubi0 -s 30MiB -N ubifs0

Volume ID 0, size 244 LEBs (31481856 bytes, 30.0 MiB), LEB size 129024 bytes (126.0 KiB), dynamic, name "ubifs0", alignment 1

root:/> cat /proc/mtd

dev: size erasesize name

mtd0: 00400000 00020000 "linux kernel(nand)"

mtd1: 07c00000 00020000 "file system(nand)"

root:/> mount -t ubifs ubi0:ubifs0 /mnt/

UBIFS: default file-system created

UBIFS: mounted UBI device 0, volume 0, name "ubifs0"

UBIFS: file system size: 30320640 bytes (29610 KiB, 28 MiB, 235 LEBs)

UBIFS: journal size: 1548288 bytes (1512 KiB, 1 MiB, 12 LEBs)

UBIFS: media format: w4/r0 (latest is w4/r0)

UBIFS: default compressor: lzo

UBIFS: reserved for root: 1432118 bytes (1398 KiB)

root:/> cat /proc/mtd

dev: size erasesize name

mtd0: 00400000 00020000 "linux kernel(nand)"

mtd1: 07c00000 00020000 "file system(nand)"

...

root:/> ubimkvol /dev/ubi0 -s 30MiB -N ubifs4

UBI error: ubi_create_volume: cannot create volume 4, error -17

ubimkvol: error!: cannot UBI create volume

error 17 (File exists)

root:/> cat /proc/mtd

dev: size erasesize name

mtd0: 00400000 00020000 "linux kernel(nand)"

mtd1: 07c00000 00020000 "file system(nand)"

root:/>

root:/> version

kernel: Linux release 2.6.30.5-ADI-2010R1-pre-svn7256, build #28 Thu Sep 24 10:39:41 CST 2009

toolchain: bfin-uclinux-gcc release gcc version 4.1.2 (ADI svn)

user-dist: release svn-8797, build #14 Thu Sep 24 10:39:09 CST 2009

root:/>

Follow-ups

--- Mingquan Pan 2009-09-24 04:03:12

sorry, I find this is related to the item MTD_UBI_GLUEBI is not configured.

After it is selected, the volumn can be shown by cat /proc/mtd.

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